Pattern and Warning Mapping for Functional Jerks

Most likely fit: Jerks occur in a recognizable context, body region or cluster, or are sometimes preceded by a repeatable sensation, muscle state, posture or task difficulty. Mapping is especially useful when the important treatment entry point occurs before a very brief jerk. [Clinical consensus]

Not the same as: Watching the body continuously, proving a psychological trigger, or diagnosing a movement from a diary. Some people have no warning and no simple trigger. Mapping should stop if it increases vigilance, distress or symptoms without producing a useful decision.

Motor and vocal tic-like symptoms

---

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For the Person With FND

What this technique does

A jerk may be over before you can respond. Pattern mapping looks for an earlier, more usable point: perhaps tingling, warmth, pulling, a sudden intake of breath, rising pain, a shoulder lifting, a hand gripping, a startle, or the beginning of a familiar cluster. It also records what you were doing and whether the movement was a single jerk or part of a longer bout.

The purpose is to answer a practical question: “Is there a moment when one already-practised strategy could be used safely?” It is not a search for fault. A pattern such as fatigue, noise, pain or surprise can be relevant to planning without being the sole cause of FND.

Anatomy in everyday language

A positive jerk contains a brief burst of muscle activity. A negative jerk contains a brief interruption of activity, which may look like a knee giving way or an object dropping. Those terms describe movement, not whether it is functional. A clinician must interpret them in the full assessment.

Map the body movement rather than labelling the whole body “tense.” A trunk bend may involve the abdominal muscles at the front and sides of the torso and the hip flexors at the front of the hip. A backward trunk movement may recruit the paraspinal muscles alongside the spine. A shoulder jerk may involve the deltoid, trapezius and muscles controlling the shoulder blade. More than one region can participate, and the visible muscle is not automatically the source of the problem.

A limited mapping exercise

Choose a short review period with your clinician—often a few representative episodes, not every jerk all day. Record only information that may change the plan:

1. Before: activity, posture, location, relevant pain, fatigue, startle or overload.
2. Warning: any repeatable sensation or movement, and roughly how much time it gives you.
3. Movement: body region and direction; single jerk, repeated jerks or loss of muscle activity.
4. Bout: how long the cluster or flare lasted, not just the split-second movement.
5. Effect: injury, dropped object, interrupted walking, lost sleep or another functional consequence.
6. Recovery: what helped you become safe and return to the activity, including when nothing helped.

Video can sometimes help a qualified clinician characterize a familiar movement, but do not delay urgent care to record an event. Obtain consent before another person records or shares a video, and store it securely.

Using the result

Look for a small number of repeatable decisions. A warning that gives several seconds may support an early attention-redirection strategy. A consistent pre-jerk posture may lead to competing or continuous movement. Pain or marked bracing may need its own assessment. No warning is also a useful finding: the immediate plan should then emphasize safety rather than demanding control that is not available.

Ask for reassessment if the jerks are new, substantially different, follow a medication or substance change, occur with altered awareness, fever, new weakness, severe headache, injury, or another neurological change.

---

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Family, Friends, and Other Supporters

Help only with information the person and clinician have agreed is useful. A brief factual note such as “three clusters while cooking; the right shoulder lifted first; hot pan was put down safely” is usually more useful than a detailed interpretation. Distinguish the number of individual jerks from the duration of the overall bout.

Do not stare, repeatedly ask whether a jerk is about to happen, or announce every movement. That can increase self-monitoring and make ordinary life feel like a test. Never provoke a startle or imitate a movement to test the pattern. During an episode, prioritize the agreed safety response; discuss patterns later, when the person wants to.

---

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Clinicians and the Care Team

Selection and differential boundary

Use mapping after an appropriate positive diagnostic formulation, not as a substitute for neurological assessment. Clarify whether the observed event is functional jerking, tic-like movement, tremor, dystonia, epileptic or nonepileptic event, positive or negative myoclonus, medication/substance effect, sleep-related movement, or another disorder. Functional and nonfunctional disorders can coexist.

Characterize onset, distribution, direction, duration, variability, distractibility, suppressibility, stimulus sensitivity, premonitory sensation, awareness and functional impact. If clinically indicated, specialist neurophysiology may combine surface electromyography (EMG, recording electrical muscle activity through skin electrodes) with electroencephalography (EEG, recording scalp electrical activity). A home log cannot supply that distinction.

Explicit mapping procedure

1. Define one decision the map should support, such as selecting an onset cue or reducing injury during meal preparation.
2. Establish a short sampling window and a stopping rule for increased hypervigilance or distress.
3. Separate the individual movement from the bout. Record latency from warning to movement when it can be estimated without deliberate provocation.
4. Describe joint movement and likely recruitment. For axial flexion, examine rectus abdominis, internal/external obliques, iliopsoas and rectus femoris as relevant; for extension, examine thoracic/lumbar paraspinals and hip extensors. For an upper-limb jerk, specify scapulothoracic, glenohumeral, elbow, forearm, wrist and digital contributions.
5. Record negative phenomena such as a brief lapse in postural activity separately from a positive muscle burst.
6. Test only safe, clinically justified contexts. Do not use startling stimuli or reproduce a severe bout merely to obtain data.
7. Identify the earliest reliable and actionable feature. Translate it plainly—for example, “your shoulder begins to lift before the arm jerk, so we will practise keeping the hand moving toward the cup while the shoulder stays easy.”
8. Trial one matched strategy and measure functional effect, injury risk, effort and later response rather than counting visible suppression alone.

Progression and measures

Once the map yields a useful decision, reduce recording. Progress from clinician observation to a brief patient-owned summary: known pattern, usable warning or no warning, selected cue, hazards, fallback and reassessment signs. Measures may include warning detection without increased vigilance, successful use of the safety plan, task interruption, injury, bout duration, return time, participation and delayed worsening.

The functional-motor physiotherapy consensus specifically notes that conventional movement retraining may be difficult for intermittent, sudden jerks and recommends looking for self-focused attention or premonitory symptoms that can be addressed through redirected attention. This is consensus guidance, not proof that warning mapping or redirection works for every person. [1][2][3]

---

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

Research and Sources

Source for this boundary: Malaty IA, Anderson S, Bennett SM, et al. Diagnosis and management of functional tic-like phenomena. Journal of Clinical Medicine. 2022;11(21):6470. FND-CIT-0110; source.

Citation	Full citation
[1]	Nielsen G, Stone J, Matthews A, et al. Physiotherapy for functional motor disorders: a consensus recommendation. Journal of Neurology, Neurosurgery & Psychiatry. 2015;86(10):1113–1119. FND-CIT-0028. https://doi.org/10.1136/jnnp-2014-309255
[2]	Nicholson C, Edwards MJ, Carson AJ, et al. Occupational therapy consensus recommendations for functional neurological disorder. Journal of Neurology, Neurosurgery & Psychiatry. 2020;91(10):1037–1045. FND-CIT-0011. https://doi.org/10.1136/jnnp-2019-322281
[3]	Peña AB, Caviness JN. Physiology-based treatment of myoclonus. Neurotherapeutics. 2020;17(4):1665–1680. FND-CIT-0092. https://doi.org/10.1007/s13311-020-00922-6

Detailed technique page created: September 11, 2026 · Clinical and accessibility review pending

---

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —